Multiple Choice
Which of the following is most likely to contribute to density-dependent regulation of populations?
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50. Population Ecology
Introduction to Population Ecology
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In population ecology, how many different types of survivorship curves are typically recognized?
A
Four
B
Two
C
Three
D
One
Verified step by step guidance1
Understand that survivorship curves are graphical representations that show the number of individuals surviving at each age for a given species or group.
Recognize that there are typically three types of survivorship curves, each representing different survival strategies in populations.
Type I survivorship curve is characterized by high survival rates during early and middle life, followed by a rapid decline in survival in later life. This is typical of species that produce fewer offspring but invest more in parental care, such as humans and large mammals.
Type II survivorship curve shows a constant death rate over the organism's life span. This is typical of species like birds, rodents, and some reptiles, where the chance of survival is independent of age.
Type III survivorship curve is characterized by low survival rates for the young, with a higher chance of survival once a certain age is reached. This is typical of species that produce many offspring but provide little or no parental care, such as many fish and invertebrates.
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